The Gemora states: The orphans have a mitzvah to pay the debt of their father.
Hundreds of Reb Meir Shapiro’s students, who viewed themselves as only children of their beloved Rebbe swore by his coffin that they would continue building the illustrious Yeshiva of their Rebbe spiritually and financially. It was in this manner that they felt that they were paying the debt of their father; continuing his legacy.
And so it was. For the next six years, until the Holocaust, his Yeshiva flourished; his spirit was present in the walls of the Yeshiva, and served as a tremendous influence to all of his disciples.